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Irwin Naturals produces Steel-Libido, a sexual-enhancement product for both sexes. It purports to increase erectile function and sex drive in men and orgasm intensity and sex drive in women.


Steel-Libido contains herbs, amino acids and dimethylglycine. The active ingredient is yohimbe, an herb that comes from West Africa.

Common Side Effects

Yohimbe's most common side effects are nausea, vomiting, rapid heart rate (tachycardia), high blood pressure, dizziness, anxiety and insomnia.

Rare Side Effects

Side effects that have been reported less often include seizures and renal failure.


Pre-existing conditions can make yohimbe dangerous for a patient. These include heart, kidney or liver disease. Pregnant and nursing women should also avoid Steel-Libido and other yohimbe-containing drugs. Patients with psychological disorders should consult their physician before ingesting yohimbe.


The effect of certain antidepressants can be increased by yohimbe, which can increase the side effects. Yohimbe-containing products should be taken under doctor supervision.

About the Author

Susan Presley

Susan Presley has worked in health care journalism since 2007, and has been published in the American Journal of Nursing and other academic periodicals. She received her Bachelor of Arts from Truman State University and a Master of Divinity degree from Louisville Presbyterian Theological Seminary.